add comments directives
post comment function add
Merge branch 'master' of https://github.com/yolo2013/ueBlog

Conflicts:
	config.js

edti conflicts in config.js about sendmail arr
Merge branch 'master' of https://github.com/yolo2013/ueBlog

Conflicts:
	config.js

bian ji config.js conflicts.
Merge pull request #1 from Genffy/master

Add comments.And the server code will be better.